It is told that on Oct 27, "mpumford@black-star.demon.co.uk" wrote thus:
> > wd0 at wdc0 channel 0 drive 0: <QUANTUM FIREBALL EX3.2A>
> Hmm. My 6.4GB Fireball EX dissappeared on my acorn32 based system. I tracked
> the problem to a couple of lines of code in __wdcwait_reset(). Maybe the same
> fix will work for you.
>
> I removed the 2 lines which read:
>
> if (er0 != 0x01 && er0 != 0x81)
> drv_mask &= ~0x01;
>
> If this works for you it looks like Quantum Fireball EX drives are not quite
> following the ATA spec.
You're right, removing those lines makes the drive reappear.
This "er0" seems to have value of zero for me, whatever that means.